Stop-valve



'ELTHAYER STOP VALVE.

No. 261,065. Patented July 11, 1882.

A fi UNITED STATES PATENT OFFICE.

ELI THAYER, OF WORCESTER, MASSACHUSETTS.

STOP-VALVE.

SPECIFICATION forming part of Letters Patent No. 261,065, dated July 11,1882. Applicaticn filed May 3, 1876. Renewed May 17, 1878. Again renewedFebruary 20, 1880.

To all whom it may concern:

Be it known that I, ELI THAYER, of Worcester, in the State ofMassachusetts, have invented a new and useful improvement in stopvalvesfor discharging or conducting fluids from reservoirs and for regulatingor graduating the flow of the same; and I do hereby declare that thefollowing is a true and accurate description thereof, reference beinghad to the accompanying drawings, forming a part of this specification.

Figure lrepresents a vertical section through its entire length of myimproved stop-valve. Fig. 2 represents a transverse section of the partor section D through a athe foundation of the valvechair n.

My invention consists in an improvement upon myinvention patentedFebruary 20,1872, whereby I prevent the possibility of the rebound orbackward pressure of water or other fluid through the threadsS,connectin g the two sections D and 0, Fig. 1. This result isaccomplished, as shown in Fig. 1, by elevating the chair n of the valveh to or near to the upper extremity of section D and in raising thevalve-seat m in section 0 the same distance, and especially insurrounding this valveseat m and considerable space below it with theprojection or band 10, which is of sutficientinternal diameter to allowample water-way 0 between its inner circumference and the valve h. Bythis construction the water receives a direction vertically downwardwhile and after passing the valve h and before leaving section 0, sothat whatever pressure there may be in the supply-pipe to which 0 isattached there can be no backward pressure through the threads S,connecting the two sections (3 and D, since the lower extremity oroutlet of D is considerably larger than the interior diameter of section0.

What I claim as my invention is- The band or projection 10 around thevalveseat m, in combination with the movable globe or section D,carrying the valve h, substantially as set forth.

ELI THAYER.

Witnesses H. R. GREENE, W. DEAN LEWIS.

